File name: usip_timer.html
SIP
timers settings
Use this page to set values for the Session Initiation
Protocol (SIP) timers that are different from those specified in RFC
3261. SIP timers provide a mechanism for session expiration.The default
values are the same as those specified for RFC 3261.
To view this administrative
console page, click .
The following SIP timers can be configured from
the administrative
console.
T1
Specifies the amount of
time, in milliseconds, for a network
round trip delay for timer T1 for the RFC 3261 specification. The
value is used as a base for calculating some timers and is relevant
for all types of transactions, such as client, server, invite, and
non-invite transactions.
Data type |
Integer |
Default |
500 |
- A
- Specifies, for UDP only, the amount of time, in milliseconds,
before retransmitting invite requests for timer A for the RFC 3261
specification. This setting is relevant for the invite client transaction.
Data
type |
Integer |
Default |
T1 |
- B
- Specifies the amount of time, in milliseconds, for the invite
client transaction timeout timer (timer B) for the RFC 3261 specification.
Data
type |
Integer |
Default |
T1*64 |
- E
- Specifies, for UDP only, the amount of time, in milliseconds,
before the retransmission of the initial non-invite request for timer
E for the RFC 3261 specification. This setting is relevant for the
non-invite client transaction.
Data type |
Integer |
Default |
T1 |
- F
- Specifies the
amount of time, in milliseconds, for the non-invite
transaction timeout timer (timer F) for the RFC 3261 specification.
This setting is relevant for the non-invite client transaction.
Data
type |
Integer |
Default |
T1*64 |
- G
- Specifies the amount of time, in milliseconds, before
retransmission
of an initial invite response for timer G for the RFC 3261 specification.
This setting is relevant for the invite server transaction.
Data
type |
Integer |
Default |
T1 |
- H
- Specifies the amount of time, in milliseconds, to wait for an
acknowledgement (ACK) receipt for timer H for the RFC 3261 specification.
This setting is relevant for the invite server transaction.
Data
type |
Integer |
Default |
T1*64 |
- J
- Specifies the amount of time, in milliseconds, to wait
for non-invite
request retransmission for timer J for the RFC 3261 specification.
This setting is relevant for the non-invite server transaction.
Data
type |
Integer |
Default |
T1*64 |
T2
Specifies
the maximum amount of time, in milliseconds,
before retransmitting non-invite requests and invite responses for
timer T2 for the RFC 3261 specification.
Data
type |
Integer |
Default |
4000 |
T4
Specifies the maximum amount of
time, in milliseconds,
for a message to remain in the network. This value is used as a base
for calculating other timers for timer T4 for the RFC 3261 specification.
Data type |
Integer |
Default |
5000 |
- I
- Specifies the amount of
time, in milliseconds, to wait for an
ACK retransmission for timer I for the RFC 3261 specification. This
setting is relevant for the invite server transaction.
Data
type |
Integer |
Default |
T4 |
- K
- Specifies the amount of time, in milliseconds, to wait for non-INVITE
response retransmissions for timer K for the RFC 3261 specification.
This setting is relevant for the non-invite client transaction.
Data
type |
Integer |
Default |
T4 |
D
Specifies
the amount of time to wait, in milliseconds,
before retransmission of the invite response for timer D for the RFC
3261 specification. This setting is relevant for the invite client
transaction.
Data type |
Integer |
Default |
32000 |
|
